Biology, 31.03.2021 02:20, claytonashley30
The percentage of oxygen in the air is 21.0%, but the percentage in air exhaled while breathing is
A. 21.0%
B. 18.0%
C. 16.0%
D. 14.0%
E. none of the above
Answers: 3
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The percentage of oxygen in the air is 21.0%, but the percentage in air exhaled while breathing is...
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